ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.

SYS Informer - Computer diagnostics, hardware monitoring, network audit, and benchmarking.

RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems

CPU-Z - CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels.

Nagios - Complete monitoring and alerting for servers, switches, applications, and services

Open Hardware Monitor - Monitors temperature sensors, fan speeds, voltages, load and clock speeds, with optional graph.